Question

how can we convert sledge into useful substance​

Answer 1

Answer:

In brief. Sewage treatment plants are chemical factories in waiting. By combining engineering expertise with chemistry and biology, plant operators can convert the solid sludge they generate into an array of useful chemical products. Some wastewater treatment plants already make phosphate and cellulose

Answer 2

Explanation:

In brief. Sewage treatment plants are chemical factories in waiting. By combining engineering expertise with chemistry and biology, plant operators can convert the solid sludge they generate into an array of useful chemical products. Some wastewater treatment plants already make phosphate and cellulose.

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